Ah, the YouTube boob shot. Back in the day (oy!) when the You in YouTube still mattered, many boobalicious busties were quick to capitalize on their crevasse-ish cleavage and, subsequently, blot out any genuine talent that might have been trying to find a foothold on the interwebs. This put male youtubers at a disadvantage, but there were still ways to game the system (strategically placed thumbnails of blissful boobies that may or may not have had anything to do with the video).
Either way, it all comes down to a simple fact of nature: sex sells. And if you stack tits against talent, tits will probably win every time.
Clearly, Darwinism at work.
The anguished musings of a jack-of-all trades creative professional based out of Longwood, Florida. Find out more about him here. You know, if that's your 'thing'.
Most of my production music is original but if I need something extra-special, I usually get it from AudioNautix.com: